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Lesson objective: Use place value concepts to solve riddles.

This lesson helps to build procedural skill with place value concepts. Place value blocks and charts are used here because they support the visualization of the value of digits. This work develops students' understanding that the three digits in a three-digit number represent the amount of hundreds, tens, and ones in that number.

Students engage in Mathematical Practice 3 (Construct viable arguments and critique the reasoning of others) as they use clues to determine the answer to riddles based on the value of digits. Explaining their reasoning, or justifying their response to a peer will allow for further practice of MP3 as well.